Method of making containers



Nov. 30, 1937. A. s. HIRSHMAN 2,100,480

METHOD OF MAKING CONTAINERS Filed Jan. 14, 1937 H J /Z:Y 22/ 24 I 26 0 I q oaol 0-525 21 I 51 V i g/ 1/2, INZYENTOR.

2% 32) I 35 0 BY W I ATTORNEY.

secure the cardboard bottom to the side wall be tweensuitableannular beads and lips. However,

Patented Nov. 30, 1937 METHOD OF MAKING CONTAINERS Abram S. Hirshman, Brooklyn, N. Y., assignor to Cordiano Can'Ca, Inc., Brooklyn, N. Y., a

corporation of New York Application January 14, 1937, Serial No. 120,481

2 Claims.

This invention relates to containers and methods for making the same.

One object of the invention is to provide an improved method adapted for the inexpensive quantity production of a container having a side wall consisting of thin sheet metal, and an end. or bottom wall consisting of a disc of cardboardlike material.

Containers of this type have certain distinct advantages, since they are cheaper because less metal is used; they have less weight; and the painting of such a container is simplified, because the end disc can be cut out of coloredpaper, and in fact, advertising matter may be cheaply prin'tedfo-nthe paper before it is assembled as a partofthe container. Obviously these operations are considerably more expensive to perform on metal; I

In containers of this kind-it has been known to it 'has'not been known how to cheaply produce such a container," and the methods heretofore available have been so-exp'ensive as to vitiate any savingsthat might be obtained by the use of thecardboard bottom.

Although reference is made herein to cardboard-like material, this term is intended to include any non-metallicmaterial having a suitable degree of stillness combined with pliability, as may be required by the practice of the-invention hereinafter described and claimed. Thus the term may include various fibrous, pressed, or composition materials. In certain of its aspects, the invention may also be applicable to bottom discs that lack pliability, including materials such as metal, wood, compositions and the like, especially where decorated before the assembling. It will be understood'that the invention applies to end a 40 discs whetherused as tops or bottoms, these terms being merely illustrative.

-It is therefore an object of the invention to provide a new and improved method which shall realize all of the advantages herei'nbefore noted,

and which shall require relatively few steps, and

be adapted for efficient operation in quantity production. r g

It will be understood that thevarious steps of the method are herein disclosed merely'as illustrative, and are susceptible of variation and substitution and interchange in respect to the order thereof.

It is a further object of the invention to provide a container having a cardboard bottom secured by opposed annular lines of pressure that clamp into the bottom to lock the same against forcible removal in either direction. 7

The drawing, which is intended to aid in the disclosure of the process, is submitted merely-in an illustrative and not in av limiting sense.

In the drawing:

Figure 1 is a view in vertical section showing a container produced according to the invention.

Fig. 2 isa' view of ablank of which the sidel Fig. 7 is a vertical sectional view showing the final step of the invention forproducing the con-- tainer of Fig. l.

Fig. '8 is an enlarged fragmentary sectional view showing how an end wall is clamped.

details. r r H Generally described, the invention contemplates subjecting a circular or cylindrical side- Fig. 9 is a sectional view showing dimensional.

Wall to a single spinning operation to slightly in-' 7 i turn an edge of the wall and to simultaneously infold the wall in relative proximity to said edge, according to acomparatively gradual or shallow shape or curvature. According to the second step asnug fitting cardboard disc is inserted in the side wall and snapped over the fold to lie between the latter andtheinturned edge. The third, final. step requires that the side wall shall be subjected to axial pressure to cause said fold to befiattened clude'an end wall or bottomdisc l2 which may and the slightly inturned edges'imultaneously' be made of like material but preferably consists of cardboard or similar materials. This card board may be moisture proof or may have been otherwise treated as desired. For connecting the disc l2 to the sidewall H, the latter may have at its end or bottom edge an annular lip l 3, and a flattened annular fold or bead portion l4 integral with the wall H. Between the inward extending lip and fold the disc 52 is annularly tightly clamped. The fold It may lie in a generally hori-. zontal plane, and the lip l3 preferably extends inward and upward in snug line contact with the disc [2. In course of flattening the fold l4 against the disc E2, the inner edge portion I5 of thefold presses into the disc [2 to likewise afiord a'tight line contact therewith, as will be hereinafter described. The close proximity of the lip l3 and fold it, with thedisc l2 clampedtherebetween, provides a strong reenforced structure.

The side wall ll may consist of a blank IS which may have corner cut outs as at IT to provide projecting portions l8 at opposite sides thereof. seamedas at IS in the usual manner, except at the cut outs ll, where the edges 20 merely slightly overlap each other as shown in Fig. 5. This facilitates the forming of the fold it and lip l3. Similar shorter cut outs may be provided at 2| 7 to permit the upper edge of the container wall to be readily beaded over, if desired.

The method of making the container it will now be described. After the blank l6 has been formed into a cylindrical wall H, the latter is subjected to deformations in any suitable manner, as by spinning or rolling operations to slightly annularly inturn the lower edge of the wall 'H as at 22 and to form the, annular reverse fold 23. These operations may be simultaneously-- performed as by means of the tools or rollers 24,

fitting disc [2 is inserted in the wall H and is pressed downward to snap over the fold 23 so as to lie between the latter and the inturned edge 22 as shown, in Fig. 6. This action is facilitated by the slope of the fold 23. 1

As thethird step of the method, the wall I i is subjected to axial pressure to flatten the fold 23 to produce the fold or bead l4, and to complete the inturning of the edge 22 to produce the lip 23; This action may be supplemented by axial pressure on the fold 23 and edge, 22 such as to aid inproducing the parts It and 13. At the same time, the wall ll may be outwardly sup;- ported against collapse or unintended deformation. These different actions may be effected simultaneously. 7 For example, a forming die may be used which may include a die member 25 having a cylindrical wall 21 fittedv in the wall H, the lower annular edgel28 of said wall being adapted to exert pressure on the fold 23. The die member 26 may also have a grooved portion 29 for receiving and annularly supporting the upper'free edge;of the Wall ll against collapse or distortion. A second die member 30 may have a'cylindrical wa'll.3l",

surrounding the wall II to inwardly support the same especially atthe region of the fold 23, and

a an inward extending annular flange 32 grooved as at 33 to form the edge 22 into the lip l3. :It will These projections may be beaded or.

Ihe fold 23 is subsesecured.

. now be apparent that upon pressing the die members 26, 30 toward each other, the parts l3, H

hence are indicated in Fig. 9, but only in an illustrative and not in a limiting sense. The thick- ,ness of the cardboard disc l2 may be approximately 0.055 inch. The thickness of the fold l4 near the edge JS'isIslightly greater than three times the thickness of the metal.

The width of the'fold I4 is approximately fifty percent greater than that of the fold 23, due to the flattening. Ifthe thickness of the metal of the wall ll be increased, the fold 23 and inturning of, the edge 22 may be correspondingly increased. The compressive strength of the material of the disc l2 may also be a factor, because it may assume considerable stress, whereas if unduly weak, it may become out unless the axial stress is taken mainly by the metal of the wall ll.

It will now be seen that my invention fulfills the objects stated and is well adapted for practical use.

Iclaim: 1

1. The method of making a. container includ ing subjecting'thecircular ,wall thereof to a forming action to simultaneously partially form an inward extending annular lip at one end thereof and an inward extending annular reverse fold to constitute a bead, inserting into said wall through the other end thereof a snug fitting disc of a relatively stiff but somewhat yielding material and pressing said disc to snap over said bead so as to' lie between'the latter and the lip, and finally subjecting said wall to axialpressure so'as to flatten the-bead topmject further inward and to simultaneouslycause said lip to be curled said wall.

to thus secure said disc to 2. The method of making a container having a cylindrical side wall of pliable sheet metal and a bottom wall consisting of a disc of cardboardlike material, including forming a blank having cutoutsleaving projecting portions at opposite edges thereof, beading together the projecting portions to' form the said wall with said cutouts said wallin spaced relation to'the lower edge thereof and simultaneously annularly inturning said lower edge, inserting said disc in snug fitting relation in said wall and pressing said disc downward-over said gradual fold so as to lie.- between the "latter, and said inturned edge, and. finally exerting axial pressureyon said wall in cluding subjecting said fold: and said inturned edge to generally axial forming pressure to flatten the fold and to further inturn said inturned edge to thus simultaneously provide annular projections between which saiddisc is tightly annularly 7o;

ABRAM s. I-HRSHMAN. 

